"Data are individual facts, statistics, or items of information, often numeric. In a more technical sense, data are a set of values of qualitative or quantitative variables about one or more persons or objects, while a datum (singular of data) is a single value of a single variable." 

Source: Wikipedia contributors. (2022, February 10). Data. Wikipedia, The Free Encyclopedia.
Online: https://en.wikipedia.org/w/index.php?title=Data&oldid=1070966246

"An object, variable, or piece of information that has the perceived capacity to be collected, stored, and identifiable. It comes largely in two forms: structured and unstructured. Structured data are essentially answers to questions asked by the collector of data, are
generally easy to organize and identify and have a strict hierarchy that is not easily manipulated (i.e. responses to a survey organized in a table format and information about
people’s years of education and income in a chart).
Unstructured data are not readily amenable to automated analysis and often are used in ways that differ from the intended purpose when collected (such as photos, videos, tweets), and do not need to follow a hierarchical method of identification. Data is also used as a policy concept and social phenomena (e.g. “data is changing the world”), or
as a shortcut for data ecosystems, Big Data, etc."

Source: Data-Pop Alliance (2015). Beyond Data Literacy: Reinventing Community Engagement and Empowerment in the Age of Data.” Data-Pop Alliance White Paper Series. Data-Pop Alliance (Harvard Humanitarian
Initiative, MIT Media Lab and Overseas Development Institute) and Internews. September 2015.

Download: https://dspace.mit.edu/handle/1721.1/123471